Granted Patent
Utility
US 5,424,441 · App. 08/237,796
N-aralkyl-and N-heteroaralkyl-aminoalkanephosphinic acids
Inventors:
Stuart J. Mickel, Wolfgang Frostl, Pascal Furet
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: May 4, 1994
Inventors
Stuart J. Mickel
Wolfgang Frostl
Pascal Furet
Assignee (at issue)
Ciba-Geigy
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.